[expand title="Fiction" rel="fiction"] bla

  [expandsub2 title="Star Wars" rel="submenu-highlander"]Target Content
[expandsub3 title="Star Wars" rel="submenu-highlander"]Target Content[/expandsub3][/expandsub2]bla </br>

  [expandsub2 title="Star Trek" rel="submenu-highlander"]Target Content[/expandsub2] </br>
  [expandsub2 title="Battlestar Galactica" rel="submenu-highlander"]Target Content[/expandsub2]
[/expand]